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Feathers of M. gui. (A) Holotype of M. gui [Institute of Vertebrate Paleontology and Paleoanthropology (IVPP) V13352] as preserved [modified from Xu et al. (12)]. (Scale bar, 5 cm.) (B) The long feathers on the hand and metatarsal sections had evolved for flight; they were asymmetric with interlocking barbules. (C) In the rest of the wing and hindleg, the feathers are symmetric (10).
